Door-bell



( Model.)

E. 0. TIBBALS.

DOOR BELL.

No. 647,694. Patented Oct. 8, 1895.

ZIL DI UNITED STATES- PATENT OFFICE.

' EMERSON C. TIBBALS, OF COBALT, CONNECTICUT.

DOOR-BELL.

SPECIFICATION forming part of Letters Patent No. 547,694, dated October8, 189

Application filed June 14,1896. semi in. 652,800- (No man.)

To all whom it may concern:

Be it known that I, EMERSON CALEB TIB- BALS, of Cobalt, in the county ofMiddlesex and State of Connecticut, have invented a new and ImprovedMechanical Bell, of which the following is a full, clear, and exactdescription.

The object of the invention is to provide a new and improved mechanicalbell which is simple and durable in construction, very effective inoperation, and arranged to positively and regularly sound a bell uponreleasing a push-button.

The invention consists, principally, of a push-button for operating asegmental gearwheel attached to a spring-pressed shaft and a,pawland-ratchet mechanism connecting the said shaft with the striker toactuate the latter after the button is released.

The invention also consists of certain parts and details andcombinations of the same, as will be fully described hereinafter, andthen pointed out in the claim.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a sectional front elevation of the improvement on the line 11 of Fig. 2. Fig. 2 is a sectional plan View of the same on the line 2 2of Fig. 1, and Fig.3 isa rear elevation of the improvement, the bellbeing removed.

The improved mechanical bell, designed for use on 'doors and otherplaces, is provided with a push-button casing A, attached in the usualmanner to the outside of a door, and in this casing operates apush-button B, provided at its rear end with an adjustable extension B,abutting againstone arm C of abell-crank lever C, pivoted at C on abracket E, forming part of a frame E, attached to the door at the insidethereof. The other arm C of the bell-crank lever C engages with itsouter end a recess D in a segmental gear-wheel D, mounted to swing on astud D held in the frame E. The segmental gt ar-wheel D is in mesh witha pinion F, attached to a shaft G, mounted to rotate in suitablehearings in the frame E.

On the shaft G is secured the inner end of a helical spring H, attachedat its outer end to a post E projecting from and forming part of theframe E. The spring H has sufficient tension to hold the shaft G, pinionF, segmental gear-Wheel D, lever C, and extension B of the push-button Bin a normal position, as shown in the drawings, so that the pushbutton Bis in an outermost position and the segmental gear-wheel D is in theposition shown in Fig. 3. Now when the push-button B is pressed inward aswinging motion is given to the bell-crank lever O, and consequently alike motion is given to the gear-wheel D, whereby the pinion F isrotated and the shaft G winds up the helical spring H. When the pressureon the button B is released, then the spring H unwinds and turns theshaft G and pinion F and the segmental gearwheel D in the oppositedirection, causing the bell-crank lever C to swing back to its normalposition and move the button B back into its outermost position. Thereturn rotary motion of the shaft G, caused by the unwinding of thespring H, is transmitted to the striker and bell, so that when thepush-button is released, as above described, the bell is sounded. Forthis purpose aratchet-wheel I is secured on the shaft G and is engagedby a springpressed pawl I, fulcrumed on the face of a gear-wheel lloosely mounted on the shaft G and in mesh with a pinion J, attached toa shaft J, mounted to turn in suitable bearings in the frame E.

On the shaft J is secured an escapementwheel K, engaged by anescapement-anchor K, secured on a shaft K journaled in the frame E andcarrying the striker L, adapted to sound the bell N, supported on theframe E. Now it will be seen that when the button B is pushed inward andthe shaft G is rotated in either direction the ratchet-wheel I isrotated with the shaft G; but the pawl I glides over the teeth of thesaid ratchet-wheel, and consequently the gear-wheel l is not rotated.When the button is released and moves into its outermost position, asabove described, by the unwinding action of the spring H, the reversemotion of the shaft Gis transmitted by the ratchet-wheel I and pawl I tothe gearwheel 1 which, by being in mesh with the pinion J, rotates theshaft J, and the escapementwheel K on the said shaft, actuating theescapement K, causes the striker L to rapidly sound the bell N duringtheentire, return movement of the said shaft G. The gearing is soarranged that when the button is re- 5 leased and moves into itsoutermost position the striker L forty times.

By the arrangement shown in the drawings the bell forms a cover orcasing for the mechstrikes the bell N from thirty to 10 anism to protectthe latter against dust.

15 a frame, of a push button, a bell crank engaged thereby, a toothed.segment connected to the bell crank, a shaft geared with the segment, aspring connected to the shaft, a spur wheel carried by the shaft, pawland ratchet mechanism connecting the shaft and spur wheel, an escapementwheel geared with the spur Wheel, an escapement lever operating with thewheel and carrying a clapper and a bell proper, the same being arrangedto embrace the mechanism, substantially as described.

EMERSON C. TIBBALS. Witnesses:

R. D. TIBBALs, ADALINE M. TIBBALS.

